CUSTOMER SUPPLIED CRANKCASE - Customer supplied Can-Am/Rotax 900 ACE case with Darton dry sleeve install. Choose from 74 or 75mm bore sizes, includes copper O-Rings to contain combustion and ARP2000 main studs. Upper case half is also linebored to lower girdle half to true up case castings for optimum oiling. Features include:

• Darton sleeve install with step deck.
• CNC finish hone to desired bore size.
• Copper O-Ring case to contain combustion.
• ARP2000 9mm main studs installed and torqued.
• Case is linebored after stud torque and shuffle pinned.
• Recommend Cometic MLS head gasket for O-Rings.
• Recommend King rod and main bearings.
• No warranty on customer supplied cases.